mirror of
https://github.com/carbon-language/carbon-lang.git
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Jon Ross-PerkinsandRichard Smith
bc63e6ae0a
This updates SourceBuffer to diagnostics. Some additional edits to diagnostics were necessary due to issues moving arguments around, which seems to stem from a compile error with clang 14 (fixed in later versions). --------- Co-authored-by: Richard Smith <richard@metafoo.co.uk>
66 lines
2.2 KiB
C++
66 lines
2.2 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#include "toolchain/source/source_buffer.h"
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#include <limits>
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#include "llvm/Support/ErrorOr.h"
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namespace Carbon {
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namespace {
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struct FilenameTranslator : DiagnosticLocationTranslator<llvm::StringRef> {
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auto GetLocation(llvm::StringRef filename) -> DiagnosticLocation override {
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return {.file_name = filename};
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}
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};
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} // namespace
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auto SourceBuffer::CreateFromFile(llvm::vfs::FileSystem& fs,
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llvm::StringRef filename,
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DiagnosticConsumer& consumer)
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-> std::optional<SourceBuffer> {
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FilenameTranslator translator;
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DiagnosticEmitter<llvm::StringRef> emitter(translator, consumer);
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llvm::ErrorOr<std::unique_ptr<llvm::vfs::File>> file =
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fs.openFileForRead(filename);
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if (file.getError()) {
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CARBON_DIAGNOSTIC(ErrorOpeningFile, Error,
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"Error opening file for read: {0}", std::string);
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emitter.Emit(filename, ErrorOpeningFile, file.getError().message());
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return std::nullopt;
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}
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llvm::ErrorOr<llvm::vfs::Status> status = (*file)->status();
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if (status.getError()) {
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CARBON_DIAGNOSTIC(ErrorStattingFile, Error, "Error statting file: {0}",
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std::string);
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emitter.Emit(filename, ErrorStattingFile, file.getError().message());
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return std::nullopt;
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}
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int64_t size = status->getSize();
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if (size >= std::numeric_limits<int32_t>::max()) {
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CARBON_DIAGNOSTIC(FileTooLarge, Error,
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"File is over the 2GiB input limit; size is {0} bytes.",
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int64_t);
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emitter.Emit(filename, FileTooLarge, size);
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return std::nullopt;
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}
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llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> buffer =
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(*file)->getBuffer(filename, size, /*RequiresNullTerminator=*/false);
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if (buffer.getError()) {
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CARBON_DIAGNOSTIC(ErrorReadingFile, Error, "Error reading file: {0}",
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std::string);
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emitter.Emit(filename, ErrorReadingFile, file.getError().message());
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return std::nullopt;
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}
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return SourceBuffer(filename.str(), std::move(buffer.get()));
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}
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} // namespace Carbon
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